MT DIABLO JUNCTION, CA US
GHCN ID: USC00045915 · CA, US · 661.4 m elevation · Records 1952-2026 (74 years)
Primary station for Clayton, CA.
Monthly climate normals (1991-2020)
| Month | High | Low | Mean | Precip | Snow |
|---|---|---|---|---|---|
| January | 53.7°F | 41.7°F | 47.7°F | 5.06 in | 0.1 in |
| February | 54.6°F | 41.7°F | 48.2°F | 4.90 in | 0.5 in |
| March | 57.9°F | 42.9°F | 50.4°F | 3.69 in | 0.1 in |
| April | 62.0°F | 44.4°F | 53.2°F | 1.92 in | — |
| May | 67.8°F | 49.3°F | 58.6°F | 1.13 in | — |
| June | 75.9°F | 55.4°F | 65.6°F | 0.27 in | — |
| July | 82.5°F | 61.5°F | 72.0°F | 0.01 in | — |
| August | 82.8°F | 61.0°F | 71.9°F | 0.03 in | — |
| September | 80.0°F | 59.7°F | 69.9°F | 0.12 in | — |
| October | 71.7°F | 54.0°F | 62.9°F | 1.19 in | — |
| November | 60.4°F | 46.2°F | 53.3°F | 2.65 in | — |
| December | 53.4°F | 41.3°F | 47.4°F | 5.08 in | — |